Tilden: bibliography of American algae. 347 



635. Hilgard, T. C. The Old Haarlem and the L atest 

 Brussels Microscopical Prize-Questions. Proc. Am. Ass. Adv. 

 Sci. 21:199-208. 1873. 



636. Hill, J. W. Is our Drinking Water Dangerous? Am 

 Water Works Ass. 1893. 



Hiude^ G. J. See DawsoD, J. W. and Hinde, (x. J. 



637. Hirst, 0. D. Method of Intensifying the Resolving 

 power of Microscopic Objectives. (Amphipleurapellucida and 

 Pleurosigma angulatum.) Mic. Bull. 5:36. 1888. 



638. Hitchcock, C. H. Geology of Maine. 2d Ann. Rep. 

 Nat. Hist. Geol. St. Maine. 331, 332. D1862. 



Fucoides cauda-galli found on an island in Moosehead lake. 



639. Hitchcock, R. Euglena and Trachelomonas. . Trans. 

 N. Y. Mic. Soc. 1 : 18-20. Jal879. 



640. . G. Winter's "On a Natural System of the 



Thallophytes." Am. Quart. Mic. Jour. 1:234, 235. Apl879. 



641. . Spring Collections. Am. Mo. Mic. Jour. 1: 



52-54. Mrl880. 



642. . The Preparation and Mounting of Microscopic 



Objects. Am. Mo. Mic. Jour. 1 : 64-66. Ap. 1 : 95, 96. My. 1 : 

 149, 150. Agl880. 2 : 28. F188] . 



643. . About Diatoms. Am. Mo. Mic. Jour. 1:84. 



Myl880. 



644. . Directions for Cleaning Diatoms. Am. Mo. 



Mic. Jour. 1 : 107-110. Je. 1 : 146-148. Agl880. 



645. . Movement of Diatoms. Am. Mo. Mic. Jour. 



2:75,76. Apl881. 



646. . Preservative Solutions for Botanical Prepara- 

 tions. Am. Mo. Mic. Jour. 2:149, 150. Agl881. 



Recipes for preserving algae. 



647. . Red Snow in Colorado. — (Am. Mo. Mic. Jour. 



2:155. Agl881.) 



Reprint of a paragraph from the New York Times. 



648. . Croton Water in August. Am. Mo. Mic. Jour. 



2:156, 157. Agl881. 



Twenty-four species of algae named. 



649. . Deby's Terrestial Diatoms. — (Am. Mo. Mic. 



Jour. 2:167, 168. S1881.) 



650. . Croton Water. Am. Mo. Mic. Jour. 2:172. 



S1881. 



Names 7 species of algae. 



